public void MoveTo_ViewBuffer_TakesPage_IfCurrentPageDoesNotHaveCapacity()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
for (var i = 0; i < 3; i++)
{
original.AppendHtml($"original-{i}");
}
// With two items, we'd try to copy the items, but there's no room in the current page.
// So we just take over the page.
for (var i = 0; i < 2; i++)
{
other.AppendHtml($"other-{i}");
}
var page = other[0];
// Act
other.MoveTo(original);
// Assert
Assert.Equal(0, other.Count); // Page was taken
Assert.Equal(2, original.Count);
Assert.Same(page, original[1]);
}
public void MoveTo_ViewBuffer_TakesPage_IfCurrentPageInOriginalIsFull()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
for (var i = 0; i < 4; i++)
{
original.AppendHtml($"original-{i}");
}
other.AppendHtml("Hi");
var page = other[0];
// Act
other.MoveTo(original);
// Assert
Assert.Equal(0, other.Count); // Page was taken
Assert.Equal(2, original.Count);
Assert.Same(page, original[1]);
}
public void MoveTo_ViewBuffer_MultiplePages()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
for (var i = 0; i < 2; i++)
{
original.AppendHtml($"original-{i}");
}
for (var i = 0; i < 9; i++)
{
other.AppendHtml($"other-{i}");
}
var pages = new List <ViewBufferPage>();
for (var i = 0; i < other.Count; i++)
{
pages.Add(other[i]);
}
// Act
other.MoveTo(original);
// Assert
Assert.Equal(0, other.Count); // Other is cleared
Assert.Equal(4, original.Count);
Assert.Collection(
original[0].Buffer,
item => Assert.Equal("original-0", item.Value),
item => Assert.Equal("original-1", item.Value),
item => Assert.Null(item.Value),
item => Assert.Null(item.Value));
Assert.Collection(
original[1].Buffer,
item => Assert.Equal("other-0", item.Value),
item => Assert.Equal("other-1", item.Value),
item => Assert.Equal("other-2", item.Value),
item => Assert.Equal("other-3", item.Value));
Assert.Collection(
original[2].Buffer,
item => Assert.Equal("other-4", item.Value),
item => Assert.Equal("other-5", item.Value),
item => Assert.Equal("other-6", item.Value),
item => Assert.Equal("other-7", item.Value));
Assert.Collection(
original[3].Buffer,
item => Assert.Equal("other-8", item.Value),
item => Assert.Null(item.Value),
item => Assert.Null(item.Value),
item => Assert.Null(item.Value));
}
public async Task ProcessAsync_RendersMainPartial_If_FallbackIsSet_AndMainPartialIsFound()
{
// Arrange
var expected = "Hello from partial!";
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var fallbackName = "_Fallback";
var model = new object();
var viewContext = GetViewContext();
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
v.Writer.Write(expected);
})
.Returns(Task.CompletedTask);
var fallbackView = new Mock <IView>();
fallbackView.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
v.Writer.Write("Hello from fallback partial!");
})
.Returns(Task.CompletedTask);
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), fallbackName, false))
.Returns(ViewEngineResult.Found(fallbackName, fallbackView.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
FallbackName = fallbackName
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
var content = HtmlContentUtilities.HtmlContentToString(output.Content, new HtmlTestEncoder());
Assert.Equal(expected, content);
}
public async Task ProcessAsync_IfHasFallback_Throws_When_MainPartialAndFallback_AreNotFound()
{
// Arrange
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var fallbackName = "_Fallback";
var expected = string.Join(
Environment.NewLine,
$"The partial view '{partialName}' was not found. The following locations were searched:",
"PartialNotFound1",
"PartialNotFound2",
"PartialNotFound3",
"PartialNotFound4",
$"The fallback partial view '{fallbackName}' was not found. The following locations were searched:",
"FallbackNotFound1",
"FallbackNotFound2",
"FallbackNotFound3",
"FallbackNotFound4");
var viewData = new ViewDataDictionary(new TestModelMetadataProvider(), new ModelStateDictionary());
var viewContext = GetViewContext();
var view = Mock.Of <IView>();
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.NotFound(partialName, new[] { "PartialNotFound1", "PartialNotFound2" }));
viewEngine.Setup(v => v.FindView(viewContext, partialName, false))
.Returns(ViewEngineResult.NotFound(partialName, new[] { $"PartialNotFound3", $"PartialNotFound4" }));
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), fallbackName, false))
.Returns(ViewEngineResult.NotFound(partialName, new[] { "FallbackNotFound1", "FallbackNotFound2" }));
viewEngine.Setup(v => v.FindView(viewContext, fallbackName, false))
.Returns(ViewEngineResult.NotFound(partialName, new[] { $"FallbackNotFound3", $"FallbackNotFound4" }));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
ViewData = viewData,
FallbackName = fallbackName
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act & Assert
var exception = await Assert.ThrowsAsync <InvalidOperationException>(
() => tagHelper.ProcessAsync(tagHelperContext, output));
Assert.Equal(expected, exception.Message);
}
public async Task ProcessAsync_UsesModelExpression_ToDetermineModel()
{
// Arrange
var expected = new PropertyModel();
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var modelMetadataProvider = new TestModelMetadataProvider();
var containerModel = new TestModel {
Property = expected
};
var containerModelExplorer = modelMetadataProvider.GetModelExplorerForType(
typeof(TestModel),
containerModel);
var propertyModelExplorer = containerModelExplorer.GetExplorerForProperty(nameof(TestModel.Property));
var modelExpression = new ModelExpression("Property", propertyModelExplorer);
var viewContext = GetViewContext();
viewContext.ViewData.Model = new object();
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
var actual = Assert.IsType <PropertyModel>(v.ViewData.Model);
Assert.Same(expected, actual);
})
.Returns(Task.CompletedTask)
.Verifiable();
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
For = modelExpression,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
view.Verify();
}
public async Task ProcessAsync_SetsHtmlFieldPrefix_UsingModelExpression()
{
// Arrange
var expected = "order.items[0].Property";
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var modelMetadataProvider = new TestModelMetadataProvider();
var containerModel = new TestModel {
Property = new PropertyModel()
};
var containerModelExplorer = modelMetadataProvider.GetModelExplorerForType(
typeof(TestModel),
containerModel);
var propertyModelExplorer = containerModelExplorer.GetExplorerForProperty(nameof(TestModel.Property));
var modelExpression = new ModelExpression("Property", propertyModelExplorer);
var viewContext = GetViewContext();
viewContext.ViewData.TemplateInfo.HtmlFieldPrefix = "order.items[0]";
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
Assert.Equal(expected, v.ViewData.TemplateInfo.HtmlFieldPrefix);
})
.Returns(Task.CompletedTask)
.Verifiable();
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
For = modelExpression,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
view.Verify();
Assert.Equal("order.items[0]", viewContext.ViewData.TemplateInfo.HtmlFieldPrefix);
}
public async Task ProcessAsync_UsesPassedInViewData_WhenNotNull()
{
// Arrange
var expected = "Explicit";
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var model = new object();
var viewData = new ViewDataDictionary(new TestModelMetadataProvider(), new ModelStateDictionary());
viewData["key"] = expected;
var viewContext = GetViewContext();
viewContext.ViewData["key"] = "ViewContext";
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
v.Writer.Write(v.ViewData["key"]);
})
.Returns(Task.CompletedTask);
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
ViewData = viewData,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
var content = HtmlContentUtilities.HtmlContentToString(output.Content, new HtmlTestEncoder());
Assert.Equal(expected, content);
}
public async Task ProcessAsync_UsesViewDataFromContext()
{
// Arrange
var expected = "Implicit";
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var viewContext = GetViewContext();
viewContext.ViewData["key"] = expected;
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
v.Writer.Write(v.ViewData["key"]);
})
.Returns(Task.CompletedTask);
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.NotFound(partialName, new[] { partialName }));
viewEngine.Setup(v => v.FindView(viewContext, partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
var content = HtmlContentUtilities.HtmlContentToString(output.Content, new HtmlTestEncoder());
Assert.Equal(expected, content);
}
public void MoveTo_ViewBuffer_CanAddToTakenPage()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
for (var i = 0; i < 3; i++)
{
original.AppendHtml($"original-{i}");
}
// More than half full, so we take the page
for (var i = 0; i < 3; i++)
{
other.AppendHtml($"other-{i}");
}
var page = other[0];
other.MoveTo(original);
// Act
original.AppendHtml("after-merge");
// Assert
Assert.Equal(0, other.Count); // Other is cleared
Assert.Equal(2, original.Count);
Assert.Collection(
original[0].Buffer,
item => Assert.Equal("original-0", item.Value),
item => Assert.Equal("original-1", item.Value),
item => Assert.Equal("original-2", item.Value),
item => Assert.Null(item.Value));
Assert.Collection(
original[1].Buffer,
item => Assert.Equal("other-0", item.Value),
item => Assert.Equal("other-1", item.Value),
item => Assert.Equal("other-2", item.Value),
item => Assert.Equal("after-merge", item.Value));
}
public async Task ProcessAsync_IfOptional_And_ViewIsNotFound_WillNotRenderAnything()
{
// Arrange
var expected = string.Empty;
var bufferScope = new TestViewBufferScope();
var partialName = "_ThisViewDoesNotExists";
var model = new object();
var viewContext = GetViewContext();
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
v.Writer.Write(expected);
})
.Returns(Task.CompletedTask);
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.NotFound(partialName, searchedLocations: Array.Empty <string>()));
viewEngine.Setup(v => v.FindView(viewContext, partialName, false))
.Returns(ViewEngineResult.NotFound(partialName, searchedLocations: Array.Empty <string>()));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
Optional = true
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
var content = HtmlContentUtilities.HtmlContentToString(output.Content, new HtmlTestEncoder());
Assert.Empty(content);
}
public void MoveTo_ViewBuffer_TakesPage_IfOriginalIsEmpty()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
other.AppendHtml("Hi");
var page = other[0];
// Act
other.MoveTo(original);
// Assert
Assert.Equal(0, other.Count); // Page was taken
Assert.Equal(1, original.Count);
Assert.Same(page, original[0]);
}
public async Task ProcessAsync_DoesNotModifyHtmlFieldPrefix_WhenModelExpressionIsNull()
{
// Arrange
var expected = "original";
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var model = new object();
var viewContext = GetViewContext();
viewContext.ViewData.Model = model;
viewContext.ViewData.TemplateInfo.HtmlFieldPrefix = expected;
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
Assert.Equal(expected, v.ViewData.TemplateInfo.HtmlFieldPrefix);
})
.Returns(Task.CompletedTask)
.Verifiable();
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
view.Verify();
}
public async Task ProcessAsync_DisposesViewInstance()
{
// Arrange
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var viewContext = GetViewContext();
var disposable = new Mock <IDisposable>();
disposable.Setup(d => d.Dispose()).Verifiable();
var view = disposable.As <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Returns(Task.CompletedTask)
.Verifiable();
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
disposable.Verify();
view.Verify();
}
public void MoveTo_ViewBuffer_CopiesItems_IfCurrentPageHasRoom()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
for (var i = 0; i < 2; i++)
{
original.AppendHtml($"original-{i}");
}
// With two items, this is half full so we try to copy the items.
for (var i = 0; i < 2; i++)
{
other.AppendHtml($"other-{i}");
}
var page = other[0];
// Act
other.MoveTo(original);
// Assert
Assert.Equal(0, other.Count); // Other is cleared
Assert.Contains(page.Buffer, scope.ReturnedBuffers); // Buffer was returned
Assert.Equal(1, original.Count);
Assert.Collection(
original[0].Buffer,
item => Assert.Equal("original-0", item.Value),
item => Assert.Equal("original-1", item.Value),
item => Assert.Equal("other-0", item.Value),
item => Assert.Equal("other-1", item.Value));
}
public void MoveTo_ViewBuffer_CopiesItems_IfCurrentPageHasRoom()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
for (var i = 0; i < 2; i++)
{
original.AppendHtml($"original-{i}");
}
// With two items, this is half full so we try to copy the items.
for (var i = 0; i < 2; i++)
{
other.AppendHtml($"other-{i}");
}
var page = other.Pages[0];
// Act
other.MoveTo(original);
// Assert
Assert.Empty(other.Pages); // Other is cleared
Assert.Contains(page.Buffer, scope.ReturnedBuffers); // Buffer was returned
Assert.Collection(
Assert.Single(original.Pages).Buffer,
item => Assert.Equal("original-0", item.Value),
item => Assert.Equal("original-1", item.Value),
item => Assert.Equal("other-0", item.Value),
item => Assert.Equal("other-1", item.Value));
}
public void MoveTo_ViewBuffer_TakesPage_IfOriginalIsEmpty()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
other.AppendHtml("Hi");
var page = other.Pages[0];
// Act
other.MoveTo(original);
// Assert
Assert.Empty(other.Pages); // Page was taken
Assert.Same(page, Assert.Single(original.Pages));
}
public void MoveTo_ViewBuffer_TakesPage_IfCurrentPageInOriginalIsFull()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
for (var i = 0; i < 4; i++)
{
original.AppendHtml($"original-{i}");
}
other.AppendHtml("Hi");
var page = other.Pages[0];
// Act
other.MoveTo(original);
// Assert
Assert.Empty(other.Pages); // Page was taken
Assert.Equal(2, original.Pages.Count);
Assert.Same(page, original.Pages[1]);
}
public void MoveTo_ViewBuffer_TakesPage_IfCurrentPageDoesNotHaveCapacity()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
for (var i = 0; i < 3; i++)
{
original.AppendHtml($"original-{i}");
}
// With two items, we'd try to copy the items, but there's no room in the current page.
// So we just take over the page.
for (var i = 0; i < 2; i++)
{
other.AppendHtml($"other-{i}");
}
var page = other.Pages[0];
// Act
other.MoveTo(original);
// Assert
Assert.Empty(other.Pages); // Page was taken
Assert.Equal(2, original.Pages.Count);
Assert.Same(page, original.Pages[1]);
}
public void MoveTo_ViewBuffer_MultiplePages()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
for (var i = 0; i < 2; i++)
{
original.AppendHtml($"original-{i}");
}
for (var i = 0; i < 9; i++)
{
other.AppendHtml($"other-{i}");
}
var pages = new List<ViewBufferPage>(other.Pages);
// Act
other.MoveTo(original);
// Assert
Assert.Empty(other.Pages); // Other is cleared
Assert.Equal(4, original.Pages.Count);
Assert.Collection(
original.Pages[0].Buffer,
item => Assert.Equal("original-0", item.Value),
item => Assert.Equal("original-1", item.Value),
item => Assert.Null(item.Value),
item => Assert.Null(item.Value));
Assert.Collection(
original.Pages[1].Buffer,
item => Assert.Equal("other-0", item.Value),
item => Assert.Equal("other-1", item.Value),
item => Assert.Equal("other-2", item.Value),
item => Assert.Equal("other-3", item.Value));
Assert.Collection(
original.Pages[2].Buffer,
item => Assert.Equal("other-4", item.Value),
item => Assert.Equal("other-5", item.Value),
item => Assert.Equal("other-6", item.Value),
item => Assert.Equal("other-7", item.Value));
Assert.Collection(
original.Pages[3].Buffer,
item => Assert.Equal("other-8", item.Value),
item => Assert.Null(item.Value),
item => Assert.Null(item.Value),
item => Assert.Null(item.Value));
}
public void MoveTo_ViewBuffer_CanAddToTakenPage()
{
// Arrange
var scope = new TestViewBufferScope();
var original = new ViewBuffer(scope, "original", pageSize: 4);
var other = new ViewBuffer(scope, "other", pageSize: 4);
for (var i = 0; i < 3; i++)
{
original.AppendHtml($"original-{i}");
}
// More than half full, so we take the page
for (var i = 0; i < 3; i++)
{
other.AppendHtml($"other-{i}");
}
var page = other.Pages[0];
other.MoveTo(original);
// Act
original.AppendHtml("after-merge");
// Assert
Assert.Empty(other.Pages); // Other is cleared
Assert.Equal(2, original.Pages.Count);
Assert.Collection(
original.Pages[0].Buffer,
item => Assert.Equal("original-0", item.Value),
item => Assert.Equal("original-1", item.Value),
item => Assert.Equal("original-2", item.Value),
item => Assert.Null(item.Value));
Assert.Collection(
original.Pages[1].Buffer,
item => Assert.Equal("other-0", item.Value),
item => Assert.Equal("other-1", item.Value),
item => Assert.Equal("other-2", item.Value),
item => Assert.Equal("after-merge", item.Value));
}
public async Task TagHelperScopes_ViewBuffersCanCombine()
{
// Arrange
var bufferScope = new TestViewBufferScope();
var viewContext = CreateViewContext(bufferScope: bufferScope);
var page = CreatePage(async v =>
{
Assert.Equal(0, bufferScope.CreatedBuffers.Count);
v.Write("Level:0"); // Creates a 'top-level' buffer.
Assert.Equal(1, bufferScope.CreatedBuffers.Count);
// Run a TagHelper
{
v.StartTagHelperWritingScope(encoder: null);
Assert.Equal(1, bufferScope.CreatedBuffers.Count);
Assert.Equal(0, bufferScope.ReturnedBuffers.Count);
v.Write("Level:1-A"); // Creates a new buffer for the taghelper.
Assert.Equal(2, bufferScope.CreatedBuffers.Count);
Assert.Equal(0, bufferScope.ReturnedBuffers.Count);
TagHelperContent innerContentLevel1 = null;
var outputLevel1 = new TagHelperOutput("t1", new TagHelperAttributeList(), (_, encoder) =>
{
return Task.FromResult(innerContentLevel1);
});
innerContentLevel1 = v.EndTagHelperWritingScope();
outputLevel1.Content = await outputLevel1.GetChildContentAsync();
Assert.Equal(2, bufferScope.CreatedBuffers.Count);
Assert.Equal(0, bufferScope.ReturnedBuffers.Count);
v.Write(outputLevel1); // Writing the taghelper to output returns a buffer.
Assert.Equal(2, bufferScope.CreatedBuffers.Count);
Assert.Equal(1, bufferScope.ReturnedBuffers.Count);
}
Assert.Equal(2, bufferScope.CreatedBuffers.Count);
Assert.Equal(1, bufferScope.ReturnedBuffers.Count);
v.Write("Level:0"); // Already have a buffer for this scope.
Assert.Equal(2, bufferScope.CreatedBuffers.Count);
Assert.Equal(1, bufferScope.ReturnedBuffers.Count);
// Run another TagHelper
{
v.StartTagHelperWritingScope(encoder: null);
Assert.Equal(2, bufferScope.CreatedBuffers.Count);
Assert.Equal(1, bufferScope.ReturnedBuffers.Count);
v.Write("Level:1-B"); // Creates a new buffer for the taghelper.
Assert.Equal(3, bufferScope.CreatedBuffers.Count);
Assert.Equal(1, bufferScope.ReturnedBuffers.Count);
TagHelperContent innerContentLevel1 = null;
var outputLevel1 = new TagHelperOutput("t2", new TagHelperAttributeList(), (_, encoder) =>
{
return Task.FromResult(innerContentLevel1);
});
// Run a nested TagHelper
{
v.StartTagHelperWritingScope(encoder: null);
Assert.Equal(3, bufferScope.CreatedBuffers.Count);
Assert.Equal(1, bufferScope.ReturnedBuffers.Count);
v.Write("Level:2"); // Creates a new buffer for the taghelper.
Assert.Equal(4, bufferScope.CreatedBuffers.Count);
Assert.Equal(1, bufferScope.ReturnedBuffers.Count);
TagHelperContent innerContentLevel2 = null;
var outputLevel2 = new TagHelperOutput("t3", new TagHelperAttributeList(), (_, encoder) =>
{
return Task.FromResult(innerContentLevel2);
});
innerContentLevel2 = v.EndTagHelperWritingScope();
outputLevel2.Content = await outputLevel2.GetChildContentAsync();
Assert.Equal(4, bufferScope.CreatedBuffers.Count);
Assert.Equal(1, bufferScope.ReturnedBuffers.Count);
v.Write(outputLevel2); // Writing the taghelper to output returns a buffer.
Assert.Equal(4, bufferScope.CreatedBuffers.Count);
Assert.Equal(2, bufferScope.ReturnedBuffers.Count);
}
Assert.Equal(4, bufferScope.CreatedBuffers.Count);
Assert.Equal(2, bufferScope.ReturnedBuffers.Count);
v.Write("Level:1-B"); // Already have a buffer for this scope.
Assert.Equal(4, bufferScope.CreatedBuffers.Count);
Assert.Equal(2, bufferScope.ReturnedBuffers.Count);
innerContentLevel1 = v.EndTagHelperWritingScope();
outputLevel1.Content = await outputLevel1.GetChildContentAsync();
Assert.Equal(4, bufferScope.CreatedBuffers.Count);
Assert.Equal(2, bufferScope.ReturnedBuffers.Count);
v.Write(outputLevel1); // Writing the taghelper to output returns a buffer.
Assert.Equal(4, bufferScope.CreatedBuffers.Count);
Assert.Equal(3, bufferScope.ReturnedBuffers.Count);
}
Assert.Equal(4, bufferScope.CreatedBuffers.Count);
Assert.Equal(3, bufferScope.ReturnedBuffers.Count);
v.Write("Level:0"); // Already have a buffer for this scope.
Assert.Equal(4, bufferScope.CreatedBuffers.Count);
Assert.Equal(3, bufferScope.ReturnedBuffers.Count);
}, viewContext);
// Act & Assert
await page.ExecuteAsync();
Assert.Equal(
"HtmlEncode[[Level:0]]" +
"<t1>" +
"HtmlEncode[[Level:1-A]]" +
"</t1>" +
"HtmlEncode[[Level:0]]" +
"<t2>" +
"HtmlEncode[[Level:1-B]]" +
"<t3>" +
"HtmlEncode[[Level:2]]" +
"</t3>" +
"HtmlEncode[[Level:1-B]]" +
"</t2>" +
"HtmlEncode[[Level:0]]",
page.RenderedContent);
}
